The idea is good but from what I saw of the game, it seems he will have many units. Would be almost impossible to generate a unique character for each unit of each player, taking into account that it is an MMO. The idea would be perfect with hero unit, but the basic soldiers would be awkward to implement, since the manual selection of loot would be very complicated and automatic can not please everyone. Now, apply the concept of experience to the battalions is the wisest thing to do. This has always been present in games, since the Old but Gold Master of Magic. And that the ranks gaining experience in accordance with their deeds in battle, without the option of the player to choose, because that would just be ridiculous.